I just finished the book about a week ago.
I wondered all the way through if Felix truly saw every person he met as gracious and beautiful and natural etc. I don't think he had a bad word to say about anyone. Except Anna Vyrubova, of course. And Alexandra and Rasputin.
I think Feix was doing "damage control" in this book. He glosses over the homosexuality, proudly claims that Irina was his "soul mate" and then says that she felt the same way about men as friends as opposed to women friends as he did.

Remember in the 1950s homosexuallity was not viewed as it is today.
It does seem as though he got through Oxford without too much hard work or study, and I don't believe that Oxford is all that easy. A lot of the things that he thought were funny, I find unsettling. Like taking his dog into England disguised as a baby.
This showed his complete disregard for authority and law.
Of course he had Imperial standing all of his life and since I don't, I guess I wouldn't understand his mind set or that of anyone who was used to getting just about everything they wanted.
As for the murder, when he was writing in 1950, Felix could say what he wanted because the files were sealed and no one else was talking especially Dimitri Pavlovich.
I never liked the representation of Felix and Dimitri in
Nicholas & Alexandra the movie, because Massie didn't portray it that way in the book. I seriously doubt that he and Dimitri sat around smoking hookah and laughing at such a dangerous moment.
I have also read Greg King's book
The Murder of Rasputin and Alex DeJong's book
The Life and Times of Grigorii Rasputin and I wonder what Felix would have to say about these books if he were alive today.
Felix was both a "legend in his own time" and a "legend in his own mind". And his legacy lives on in the dislaimer which is now posted on all movies "any similarity to any person living or dead is entirely coincidental". I always thought that his timely sueing of Paramount Pictures helped save him and Irina from living in poverty.
I bought the book because I wanted to read his own words. (I only hope that nothing was gained or lost in the translation). Do I believe all of it? No.
But pehaps only the spoiled self indulgent son of the richest family in Imperial Russia could plan a murder and execute it with so little thought or regret. Perhaps not regret killing Rasputin, whom he and many others thought was ruining thier way of life with his interference at the Imperial court, but no regret at the taking of a human life. Even soldiers in battle have trouble with that.